Waterproofing is a method which prevents water from penetrating your house. Waterproofing is very important as it helps keep your house dry. It helps reduce humidity inside the house and thereby protects things inside your house from damage caused due to humidity or water exposure. It is also important for the veracity of the building.

 

Why Waterproof You Structure?

  • The problem-substrates shrink, move and crack

 

 

 

Advantages of waterproofing:

Variety of options

Depending on the level of water damage or owner preference, waterproofing systems can be installed indoors or outdoors.There are also DIY (Do it yourself) options available if you don’t want to spent extra for hiring a contractor.

 

Property value

Waterproofing increases your house’s value, which is the biggest advantage. This system prevents unwanted moisture from seeping into your walls, thereby allowing mold to grow. Mold can impact our health in a negative way. It also prevents damage caused due to water seepage which can ruin the structural integrity of your home. Moisture also causes metals to rust and wood to decay. As you know unhealthy living areas and weak foundations will affect the property value of your house. Also, waterproofing systems can open up the basement area and thereby increase the utility of your home’s square footage. This also helps in increasing the value of your house in the market.

 

Water Ingress Mechanisms

 

 

How water can penetrate concrete structures?

 

 

Intrinsic Cracks

 

 

Why Waterproof Your Structure?

  • Liability issues
  • Structural integrity
  • Consequential damage
  • Provide additional usage space
  • Unexpected water sources (grade, sewer lines)

 

Where To Apply Waterproofing

  • Positive Side Waterproofing
  • Negative Side Waterproofing
  • Blind Side Waterproofing
  • Interior Applications
  • Exterior Applications

 

 

Negative Side Waterproofing

  • Interior side opposite the water pressure side of the structure
  • Most commonly used in
    • Remedial work
    • Elevator pits
    • Tank Liners

 

 

Interior Applications

Positive Side Waterproofing

  • Split Slabs
  • Bathrooms
  • Laboratories
  • Mechanical rooms
  • Kitchens
  • Fountains
  • Planters

Negative Side Waterproofing

  • Elevator pits
  • Retrofit

 

Exterior Applications

Positive Side Waterproofing

  • Foundation walls
  • Plaza decks
  • Tunnels
  • Parking decks
  • Balconies
  • Bridge decks
  • Planters
  • Roofing

Blind Side Waterproofing

  • Soil retention systems
  • Party walls
  • Cut and cover tunnels
  • Under slab
  • Elevator pits
  • Underpinning

 

 

Types of Waterproofing

  • Sheet Membrane Waterproofing
    • Lose laid - PVC, HDPE, etc
    • Bonded - self-adhesive, hot applied
  • Liquid Waterproofing
    • One or two component
    • Applied by hand, by spray
    • Hot applied, cold applied
  • Bentonite Waterproofing
  • Metal Oxide Waterproofing
  • Cementitious Waterproofing

 

 

 

 

Waterproofing — Sheet Membrane or Liquid?

 AdvantagesDisadvantages
Controlled, guaranteed thicknessLaps
Sheet Membrane Robust, self-reinforcedComplex detailing
No mixing or specialist equipment
Trafficked immediately
 SeamlessVariable thickness
LiquidGood for complex geometriesCure time
Quick coverage with spray applicationMixing and spray equipment
Minimal substrate preparation

 

 

Metal Oxide and Cementitious

  • Primarily Portland cement-based materials
  • Positive and negative side applications
  • Inflexible, subject to cracking
  • Low cost

 

 

Importance of Waterproofing

  • If we refer back to the definition of waterproofing as an impervious barrier designed to prevent water entering or escaping from building structures. Problems caused by water
  • Rotting of timber structures and finishes such as floor joints, beams, floors, studs, skirting, architraves and frames.
  • Corrosion of metals such as steel reinforcement in concrete, steel beams, lintels, metal door frames etc.
  • Swelling of plasterboards and the subsequent debonding of ceramic tiles.
  • Electrical hazards causing the possible short circuit of lighting and power points.
  • The blistering of paint.
  • Unsightly deterioration of the building facade.
  • Health problems due to dampness, which may lead to respiratory problems.
  • Rutting rarnet

 

Source & Causes of leakages

Sources of leakages

  • Sources of leakages
  • Subsoil water rising by capillary action.
  • Cracks in external plaster
  • Vegetation growth
  • Separation gaps between partition wall and beams and the columns.
  • From expansion joints

 

Causes of leakages

  • Defective structural design
  • Use of poor quality construction material
  • Porous structures
  • Improper methodology of construction
  • Improper slopes on top surfaces.